A set of colors.
RColor
s can be conveniently generated from this.
A palette associates a color with an ordinal number: for a normalized palette, this number ranges from 0..1. For uservalued palettes, the palette yields a color for usercoordinates (for instance histogram content), in an arbitrary range.
A palette can be a smooth gradients by interpolation of support points, or a set of discrete colors.
Definition at line 38 of file RPalette.hxx.
Classes  
struct  Discrete_t 
Tag type used to signal that the palette's colors should not be interpolated. More...  
struct  OrdinalAndColor 
An ordinal value and its associated color. More...  
Public Member Functions  
RPalette ()=default  
RPalette (const std::vector< OrdinalAndColor > &interpPoints)  
Construct a RPalette from a vector of (ordinalcolor) pairs as interpolation points.  
RPalette (const std::vector< RColor > &interpPoints)  
Construct a normalized RPalette from a vector of colors as interpolation points.  
RPalette (Discrete_t, const std::vector< OrdinalAndColor > &points)  
Construct a RPalette from a vector of (ordinalcolor) pairs.  
RPalette (Discrete_t, const std::vector< RColor > &points)  
Construct a normalized RPalette from a vector of colors.  
RColor  GetColor (double ordinal) 
Get the color associated with the ordinal value.  
bool  IsDiscrete () const 
Whether the palette is discrete, i.e. does no interpolation between colors.  
bool  IsGradient () const 
Whether the palette is a smooth gradient generated by interpolating between the color points.  
bool  IsNormalized () const 
Whether the palette is normalized, i.e. covers colors in the ordinal range 0..1.  
Static Public Member Functions  
Global Palettes  
static void  RegisterPalette (std::string_view name, const RPalette &palette) 
Register a palette in the set of global palettes, making it available to GetPalette() .  
static const RPalette &  GetPalette (std::string_view name="") 
Get a global palette by name.  
Static Public Attributes  
static constexpr const Discrete_t  kDiscrete {} 
Tag value used to signal that the palette's colors should not be interpolated.  
Private Member Functions  
RPalette (bool interpolate, bool knownNormalized, const std::vector< OrdinalAndColor > &points)  
RPalette (bool interpolate, const std::vector< RColor > &points)  
Private Attributes  
std::vector< OrdinalAndColor >  fColors 
Palette colors: the color points and their ordinal value.  
bool  fInterpolate = true 
Whether to interpolate between the colors (in contrast to picking one of fColors).  
bool  fNormalized = true 
Whether the palette's ordinal numbers are normalized.  
#include <ROOT/RPalette.hxx>

private 
Definition at line 21 of file RPalette.cxx.
Definition at line 52 of file RPalette.cxx.

default 

inline 
Construct a RPalette from a vector of (ordinalcolor) pairs as interpolation points.
Palette colors will be these points for the ordinal, and interpolated in between the ordinal points. The points will be sorted. The palette is normalized if the lowest ordinal is 0. and the highest ordinal is 1.; otherwise, the palette is a uservalued palette.
Definition at line 85 of file RPalette.hxx.

inline 
Construct a RPalette from a vector of (ordinalcolor) pairs.
For a given value, the palette returns the color with an ordinal that is closest to the value. The points will be sorted. The palette is normalized if the lowest ordinal is 0. and the highest ordinal is 1.; otherwise, the palette is a uservalued palette.
Definition at line 91 of file RPalette.hxx.

inline 
Construct a normalized RPalette from a vector of colors as interpolation points.
The ordinal associated with each color is equidistant from 0..1, i.e. for three colors it will be 0., 0.5 and 1, respectively. Palette colors will be these points for the ordinal associated with the color, and interpolated in between the ordinal points.
Definition at line 97 of file RPalette.hxx.

inline 
Construct a normalized RPalette from a vector of colors.
The ordinal associated with each color is equidistant from 0..1, i.e. for three colors it will be 0., 0.5 and 1, respectively. For a given value, the palette returns the color with an ordinal that is closest to the value.
Definition at line 102 of file RPalette.hxx.
Get the color associated with the ordinal value.
The value is expected to be 0..1 for a normalized palette.
Definition at line 56 of file RPalette.cxx.

static 
Get a global palette by name.
Returns an empty palette if no palette with that name is known. This function is not thread safe; any concurrent call to global Palette manipulation must be synchronized!
Definition at line 143 of file RPalette.cxx.

inline 
Whether the palette is discrete, i.e. does no interpolation between colors.
Definition at line 108 of file RPalette.hxx.

inline 
Whether the palette is a smooth gradient generated by interpolating between the color points.
Definition at line 111 of file RPalette.hxx.

inline 
Whether the palette is normalized, i.e. covers colors in the ordinal range 0..1.
Definition at line 105 of file RPalette.hxx.

static 
Register a palette in the set of global palettes, making it available to GetPalette()
.
This function is not thread safe; any concurrent call to global Palette manipulation must be synchronized!
Definition at line 138 of file RPalette.cxx.

private 
Palette colors: the color points and their ordinal value.
Definition at line 58 of file RPalette.hxx.

private 
Whether to interpolate between the colors (in contrast to picking one of fColors).
Definition at line 61 of file RPalette.hxx.

private 
Whether the palette's ordinal numbers are normalized.
Definition at line 64 of file RPalette.hxx.

staticconstexpr 
Tag value used to signal that the palette's colors should not be interpolated.
Can be passed to the constructor: RPalette palette(RPalette::kDiscrete, {{100., RColor::kWhite}, {100., RColor::kRed}})
Definition at line 76 of file RPalette.hxx.